Security readout for executives and security teams
Plain-English summary
CVE-2021-46442 affects the D-Link DIR-825 G1 router. The reported issue lets an unauthenticated attacker access protected web upgrade functions, including configuration download and firmware update actions. That could expose sensitive network settings or let someone alter device software if the management interface is reachable.
Executive priority
Treat this as high priority for any deployed DIR-825 G1 exposed beyond trusted administration networks. The business risk is loss of router control or disclosure of network configuration, but source evidence is incomplete on versions and fixes.
Technical view
The CVE describes an authentication bypass in the DIR-825 G1 webupg binary involving autoupgrade.asp-related parameters. The public record names configuration download and firmware update as reachable without authorization. The bundle does not provide CVSS, affected firmware versions, or a vendor-fixed version.
Likely exposure
Exposure is most likely where D-Link DIR-825 G1 management services are reachable from untrusted networks. The source bundle does not identify affected firmware versions, so owners must verify model, firmware, and vendor support status.
Exploitation context
The CVE is not listed as CISA KEV in the provided bundle. The sources do not establish active exploitation. A public GitHub reference is cited by the CVE, so vulnerability details may be publicly discoverable.
Researcher notes
Key gaps are missing CVSS, firmware version range, CWE mapping, and fixed-release information. Validation should focus on asset confirmation, management-plane exposure, and vendor bulletin review rather than assuming broader D-Link product impact.
Mitigation direction
- Check D-Link security guidance for DIR-825 G1 firmware or retirement recommendations.
- Remove router management interfaces from internet and guest-network access.
- Limit administration to trusted networks or VPN paths only.
- Rotate credentials and secrets if configuration files may have been exposed.
- Replace the device if no supported vendor fix is available.
Validation and detection
- Inventory D-Link DIR-825 G1 devices and record firmware versions.
- Confirm management interfaces are not reachable from untrusted networks.
- Review device logs for unexpected configuration downloads or firmware changes.
- Verify vendor guidance against the installed firmware release.
- Document compensating controls where patch status remains unclear.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-46442 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dlink.com/en/security-bulletin/CVE reference · x_refsource_MISC
- https://github.com/tgp-top/D-Link-DIR-825CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.